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- ‘Mabel Blackwell’
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- ‘Maculata Superba’
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- ‘Madame de Cannart d’Hamale’
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- ‘Madame Haas’
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- ‘Madame Lebois’
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- ‘Madame Martin Cachet’
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- ‘Madame Victor de Bisschop’
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- ‘Madge Miller’
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- ‘Maestosa’
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- ‘Magic Moments’
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- ‘Magnoliiflora’
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- ‘Maiden’s Blush’
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- ‘Maiden’s Blush’
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- ‘Man Size’
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- ‘Marchesa d’Ambra’
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- ‘Margaret Crozier’
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- ‘Margaret Davis’
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- ‘Margaret Rose’
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- ‘Margaret Short’
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- ‘Margaret Waterhouse’
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- ‘Margarete Hertrich’
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- ‘Margherita Coleoni’
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- ‘Marguerite Gouillon Rose’
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- ‘Marian Mitchell’
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- ‘Mariann’
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- ‘Marianna Gaeta’
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- ‘Marie Bracey’
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- ‘Marjorie Magnificent’
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- ‘Marjorie Waldegrave’
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- ‘Mark Alan’
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- ‘Maroon and Gold’
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- ‘Martha Brice’
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- ‘Mary Alice Cox’
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- ‘Mary Christian’
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- ‘Mary Costa’
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- ‘Mary Larcom’
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- ‘Mary Phoebe Taylor’
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- ‘Mary Williams’
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- ‘Masayoshi’
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- ‘Masquerade’
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- ‘Masterpiece’
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- ‘Mathotiana Alba’
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- ‘Mathotiana Rosea’
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- ‘Mathotiana Rubra’
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- ‘Mathotiana Supreme’
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- ‘Matterhorn’
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- ‘Mattie Cole’
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- ‘Maud Messel’
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- ‘Mercury’
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- ‘Mercury Variegated’
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- ‘Mermaid’
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- ‘Merry Christmas’
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- ‘Michael’
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- ‘Midnight’
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- ‘Midnight Magic’
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- ‘Midnight Serenade’
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- ‘Mignonne’
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- ‘Mikenjaku’
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- ‘Mildred Veitch’
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- ‘Milo Rowell’
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- ‘Mimosa Jury’
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- ‘Minato-no-akebono’
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- ‘Mine-no-yuki’
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- ‘Ming Temple’
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- ‘Minnie Maddern Fiske’
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- ‘Mirage’
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- ‘Miss Charleston’
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- ‘Mississippi Beauty’
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- ‘Miss Lyla’
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- ‘Miss Tulare’
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- ‘Miss Universe’
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- ‘Moira Reid’
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- ‘Momijigari’
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- ‘Mona Lisa’
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- ‘Monarch’
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- ‘Monica Dance’
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- ‘Monsieur Faucillon’
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- ‘Monte Carlo’
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- ‘Monticello’
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- ‘Moonlight’
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- ‘Moonlight Bay’
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- ‘Moonlight Sonata’
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- ‘Moshe Dayan’
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- ‘Moshio’
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- ‘Mrs Anne Marie Hovey’
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- ‘Mrs Bell’
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- ‘Mrs Derlacquer’s Beauty’
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- ‘Mrs D.W. Davis’
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- ‘Mrs D.W. Davis Descanso’
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- ‘Mrs Lyman Clarke’
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- ‘Mrs Swan’
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- ‘Mrs T Brockhouse’
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- ‘Mrs Tingley’
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- ‘Mrs William Thompson’
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- ‘Muskoka’
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- ‘Mystique’
Jim's Camellias 